If Originally There Were X Atoms of Radioactive Isotope Present

question 39

Multiple Choice

If originally there were X atoms of radioactive isotope present and now there are only X/2 atoms, how many half-lives have elapsed?

• A) 3
• B) 1
• C) 4
• D) 2

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Definitions:

Arteriosclerosis

The thickening, hardening, and loss of elasticity of the walls of arteries which can restrict blood flow.

Angina Pectoris

A condition marked by severe chest pain due to inadequate blood flow to the heart muscle, often a symptom of coronary artery disease.

Stroke

A medical condition where poor blood flow to the brain results in cell death, causing partial or complete loss of muscle control and, in severe cases, death.

Coronary Artery Disease

A condition characterized by the narrowing or blockage of the coronary arteries, leading to reduced blood flow to the heart muscle.